code: def multiply(a, b):
      return a * b
  
file_path: petastorm/petastorm/tests/test_run_in_subprocess.py
imports: import unittest
  from functools import partial
  from petastorm.unischema import dict_to_spark_row, Unischema
  from petastorm.utils import run_in_subprocess
label_desc: Use image node_id 2 for calling a global function with example usage: multiply(a, b) and returns: unknown